The Washer,flat, cataloged under National Stock Number 5310-01-488-5611, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Catalog Facts
Item Name
Washer,flat
FSC / FSG
5310 — Nuts and Washers (FSG 53)
Technical Specifications
Parameter
Value
NSN
5310-01-488-5611
Item Name
Washer,flat
FSC / FSG
5310 / 53 — Nuts and Washers
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
⇄Related Items6
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-489-59581-64173-057POSSIBLE MATCH
GUIDE,VALVE STEM
Possible match (shared part number)Circor Aerospace, Inc. Dba Circor Aerospace Inc
4820-01-489-59782-20677-019POSSIBLE MATCH
BALL,VALVE,PORTED
Possible match (shared part number)Circor Aerospace, Inc. Dba Circor Aerospace Inc
5340-01-490-25562-12122-001POSSIBLE MATCH
HANDLE,MANUAL CONTROL
Possible match (shared part number)Circor Aerospace, Inc. Dba Circor Aerospace Inc
3120-01-494-31341-19582-097POSSIBLE MATCH
BEARING,WASHER,THRUST
Possible match (shared part number)Circor Aerospace, Inc. Dba Circor Aerospace Inc
5305-01-644-220350420-086POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
Possible match (shared part number)Circor Aerospace, Inc. Dba Circor Aerospace Inc
5305-01-644-234050527-202POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
Possible match (shared part number)Circor Aerospace, Inc. Dba Circor Aerospace Inc
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
3-80114ITEM4
5/9Secondary reference
Circor Aerospace, Inc. Dba Circle Seal Controls Use CAGE Code 91816 for Cataloging
1-19584-073
3/2Design control — primary reference
U.S. Government activity
3-80114
D/9Drawing number reference only
Circor Aerospace, Inc. Dba Circle Seal Controls Use CAGE Code 91816 for Cataloging
Related Parts
4820-01-489-5958POSSIBLE MATCH
GUIDE,VALVE STEM
1-64173-057
4820-01-489-5978POSSIBLE MATCH
BALL,VALVE,PORTED
2-20677-019
5340-01-490-2556POSSIBLE MATCH
HANDLE,MANUAL CONTROL
2-12122-001
3120-01-494-3134POSSIBLE MATCH
BEARING,WASHER,THRUST
1-19582-097
5305-01-644-2203POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
50420-086
5305-01-644-2340POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
50527-202
Frequently Asked Questions
What is NSN 5310-01-488-5611?
NSN 5310-01-488-5611 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
What NSN replaces 5310-01-488-5611?
6 possible matches (shared part number, not a government interchangeability claim): 4820-01-489-5958, 4820-01-489-5978, 5340-01-490-2556. Verify interchangeability with system specifications before substitution.
Is NSN 5310-01-488-5611 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.